Leavenworth, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Leavenworth in?

Leavenworth is in Chelan County, EPA Zone 3.

Q: How much does radon mitigation cost in Leavenworth?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Chelan County

EPA Zone 3

Nestled in the Cascade Mountains of Chelan County, Leavenworth is a popular tourist destination built on granite and metamorphic bedrock typical of the North Cascades. The area's EPA Zone 3 classification suggests generally low radon potential, though mountain geology can be unpredictable. With no current testing data available for zip code 98826, residents and property owners in this scenic alpine community should still consider radon testing for baseline measurements.

Leavenworth, WA Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Leavenworth, WA Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Leavenworth Radon Facts

Key details about the radon risk profile for Leavenworth and the 98826 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Chelan County, WA

Zip Code

98826

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Leavenworth and the 98826 zip code are located in Chelan County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Leavenworth, WA

What EPA Radon Zone is Leavenworth in?

Leavenworth and the 98826 zip code are in Chelan County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

How much does radon mitigation cost in Leavenworth?

Radon mitigation in Leavenworth typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in Leavenworth?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.

Most Active Radon Markets in Washington

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Vancouver	6.56 pCi/L	9
Kent	3.60 pCi/L	5
Seattle	5.25 pCi/L	4
Olympia	5.00 pCi/L	4
Bellevue	3.75 pCi/L	4
Spokane	11.67 pCi/L	3
Camas	8.00 pCi/L	3
Centralia	7.00 pCi/L	3
Bellingham	4.50 pCi/L	2
Kirkland	4.50 pCi/L	2
Washougal	8.00 pCi/L	1
Ridgefield	5.00 pCi/L	1
Moses Lake	No submissions	0